Structural stability and electrical properties of $Sr2FeMoO6$ under high pressure

The structural stability and electrical properties of $Sr2FeMoO6$ under high pressure at room temperature have been studied using energy dispersive x-ray diffraction with synchrotron radiation and resistance and capacitance measurements. The x-ray diffraction results show that the structure of $Sr2FeMoO6$ remains stable up to 40 GPa. The equation of state of $Sr2FeMoO6$ is obtained from the $V/V0–P$ relationship. The bulk modulus $B0$ and its first-order derivative $B0′$ of $Sr2FeMoO6$ were calculated based on the Birch–Murnaghan equation. The electrical resistance undergoes a metallic transition at about 2.1 GPa. The metallic transition may be caused by a change in the electronic structure induced by high pressure.